RP/IS-A-20
Series 20, 20S, L20 and Cu20
to Sill Cock
Water Pressure
Reducing Valve
Water Meter
Model L20
Water Supply
to Fire sprinklers
Main
Supply
Model 20S
Basic Installation Instructions
IMPORTANT: Inquire with governing authorities for local
installation requirements.
A.
Ames dual check valves may be installed in either a vertical
or a horizontal position. Series 20 should be installed
downstream of the water meter and of the water pressure
regulator. All outlets including sill cocks must be downstream of the Series 20. Series 20S should be installed at
the fire sprinkler service connection to the main line.
NOTE: When a pressure reducing valve or dual check valve is
installed in the supple line it creates a closed system which makes
plumbing code compliance imperative for system safety. Special
attention must be given by all concerned to assure pressure relief
protection is provided to protect water heater equipment. It is
important to make certain an approved ANSI Z21.22 temperature
and pressure relief valve is installed on the storage water heater.
B.
They should always be installed in an accessible location to
facilitate the removal for servicing and testing.
C.
Pipe lines should be thoroughly flushed to remove foreign
material before installing the unit.
D.
Protect from freezing
E.
Ensure that valve is installed in proper flow direction. Refer
to flow direction arrow on valve nameplate or body.
F.
When installing valve in pipe line, only use wrenching flats
provided. Do not apply wrench to body of valve. This will
prevent distorting the valve body and component parts.
G. These valves incorporate an O-ring union seal that requires
minimum tightening of union nut. Do not overtighten.
H.
I.
These valves contain plastic check modules and should
never be directly sweated into the line. Sweat fit adapters
should be sweated into the line prior to valve installation.
Avoid improper application and excessive pipe sealants
such as Teflon® tape and pipe dope.
High System Pressure
If the downstream system pressure is higher than the set
pressure under no flow conditions, the cause could be thermal
expansion, pressure creep or dirt/debris on the seat.
Thermal expansion occurs whenever water is heated in a
closed system. The system is closed when supply pressure
exceeds 150psi (10.3 bar), or a check valve or backflow
preventer is installed in the supply piping.
You must make provisions for pressure relief protection of your
plumbing system and components. The use of a relief valve or
potable water expansion tank may be required.
To determine if this is the result of thermal expansion, try briefly
opening the cold water tap. If the increased pressure is caused
by thermal expansion, the pressure will immediately be relieved
and the system will return to the set pressure.
Limited Warranty: Ames Company warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In
the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special
or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting
from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no
control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above
limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to determine
your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
www.amesfirewater.com
A Division of Watts Water Technologies, Inc.
Service, Replacement Parts and Maintenance
Servicing Series 20, 20S
Series 20
1.
Remove the Series 20 from the line (union nut and adapter
remain in the line).
2.
Remove the two check modules by pressing firmly from the
outlet end (end with wrench pads). O-ring seals will be
removed with the removal of modules from the body.
Individual O-ring Check Seals
CAUTION: To prevent damage to O-ring seals, do not attempt to
pry the O-ring seal free before removing check modules.
NOTE: Complete check module assemblies are available as
replacement parts. It is recommended that if check modules are
fouled, that the entire check module be replaced.
2nd Check Module
1st Check Module
3.
Inspect body bore and clean surfaces of any foreign
material.
4.
Using silicone grease, apply small amount to each exterior
surface of the O-ring seals. If O-ring is to be replaced, lubricate as above. A light application of silicone grease to inlet
of body bore is beneficial. Do not lubricate seat of seat
disc.
NOTE: Only FDA approved silicone grease should be used and is
furnished with each Ames Model 20, 20S dual check repair kit.
5.
O-ring
O-ring Module seal
Reinsert the check modules and O-rings into body in direction of flow.
Kit for Series 20, 20S
ORDERING CODE
KIT NO.
SIZE
in.
0085613
RK 20/Cu20 T
12
mm
14
⁄ - 1 ⁄ 20
15 - 32
⁄ - 1 Cu20
15 - 25
0085614
RK 20S T
1 - 11⁄4 20S
25 - 32
Kit Includes: First and Second Check modules, O-rings and spacers if needed.
12
NOTE 1: For 20S the spacer slots must be aligned with the ribs of
the first check module before inserting
NOTE 2: 1st and 2nd check modules are identical and
interchangeable. Do not overtighten union nut.
Series L20
Servicing Model L20
1.
Shut off water at street side of meter.
2.
Remove covers and remove Disc Assembly.
3.
Inspect rubber disc for dirt or debris.
4.
Clean and/or replace as needed.
5.
Inspect machined seat area for nicks and mineral build up
clean with emery cloth.
6.
Reassemble the check assembly in the reverse order. (1st
and 2nd check modules are identical and interchangeable)
Check Covers
1st Check Module
2nd Check Module
Outlet
Inlet
Kit for Series L20
ORDERING CODE
KIT NO.
SIZE
in.
0085615
RK L20 T
34
⁄ ,1
mm
20 - 25
www.amesfirewater.com
A Division of Watts Water Technologies, Inc.
RP/IS-A-20 0904
USA: Backflow- 1427 N. Market Blvd • Suite #9 • Sacramento, CA 95834 • T: 916-928-0123 • F: 916-928-9333
Control Valves- 18550 Hansen Road • Houston, TX 77075 • T: 713-943-0688 • F: 713-944-9445
Canada: 5435 North Service Rd. • Burlington, ONT. L7L 5H7• T: 905-332-4090 • F: 905-332-7068
EDP# 1915925
©Ames Fire & Waterworks, 2009